JPS59171616A - Lamination of prepreg - Google Patents

Abstract

PURPOSE:To enable prepregs to be laminated continuously and automatically by a method wherein the 1st belt-like prepreg and the 2nd belt-like prepreg are fed independently, cut adequately, heated, bonded under pressure and lapped over each other. CONSTITUTION:Process A in which the 1st beltlike prepreg 1 is sent intermittently in the fixed direction X, process B in which the 2nd belt-like prepreg 2 is sent in the direction shifted by a specified angle to the above direction X, lapping process C in which these prepregs 1, 2 are heated and bonded under pressure, process D in which the 2nd prepreg 2 is cut by that width along the side edge of the 1st prepreg, process E in which the 3rd beltlike prepreg 3, for example, is fed in the specified direction X in synchronization with the 1st prepreg 1, and lapping process F in which this 3rd prepreg 3 is heated and bonded under pressure on the 2nd prepreg 2 that is cut and lapped on the 1st prepreg provide a laminated substance of prepreg.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laminating method using prepreg as a material.

It has been conventionally known that although prepreg has remarkable strength in the fiber direction, it is weak against tensile force in other directions, especially in the direction intersecting the fiber direction.

Therefore, by using prepreg as a material and laminating them with different fiber directions, attempts have been made to use the conventional J-force method for each building in order to obtain something that has strength regardless of the direction. However, all of them were still handmade.

In addition, the work efficiency is poor, it takes time, and the product quality is poor due to the fact that dust and other substances adhere to the laminated surface due to manual work.In particular, lamination of products with a large number of J- is extremely troublesome, etc. Problems were pointed out.

In view of these circumstances, the present invention has been made to solve the above-mentioned problems of the conventional example.The present invention is made by feeding out all the strip-shaped prepregs as a stack, cutting them as appropriate, heat-pressing them, and polymerizing them. In particular, the purpose is to propose a method for laminating prepregs continuously and automatically.

Embodiments of the present invention will be described below based on the drawings.

First, the basic structure will be explained. This lamination method consists of a feeding step A in which a strip-shaped first prepreg 1 is intermittently delivered in a fixed direction A delivery process B in which the two prepregs 1 and 2 are delivered, a polymerization process C in which the two prepregs 1 and 2 are bonded under heat and pressure, and the side edge V of the first prepreg 1 is aligned with the width of the second prepreg 2. In the cutting process of cutting the strip-shaped third prepreg 3, the third prepreg 3 is cut into the first
A delivery step E in which the third one leg 3 of the above-mentioned constant force direction X & is sent out in synchronization with the prepreg L of the above, and the prepreg 2 of the Zheng 2 which is cut and polymerized onto the first prepreg L. It also has a polymerization process 8F for heat and pressure bonding.

Next, details of this lamination method will be explained.

First, in the feeding step A, the unrolled prepreg 1' held in a holder or the like is unwound, and the first prepreg l, which has become a straight strip, is moved in a fixed direction X intermittently.
For example, in the illustrated example, the strip-shaped second prepreg 2 is intermittently fed out by the width ζ by a roller or the like. At this time, if the prepreg 1' has a release paper 4 interposed therein, it is unrolled and separately wound up on the winding section 5.

Also, in the feeding step BK, the prepreg 2' that has been wound up and held in a holder or the like is unwound, and the second prepreg 2 in the form of a linear band is fed out in a constant direction Y using a roller or the like. This constant force direction Y is a direction of the sword that is shifted by a predetermined angle from the direction X, for example, a direction that is shifted by 90 degrees and is orthogonal to the direction of the sword. And this angle is 45°
, 30°, etc. may be determined as appropriate. In this way, the fiber directions of both prepregs 1.2 are different. At this time, if the release paper 6 is interposed in the prepreg 2',
Rewind this as well and set aside the winding part 7 without VC.

Then, in the next polymerization step C, both of these prepregs 1.2'i are heat-pressed. That is, the end of the second prepreg 2 is sent out and placed on the first prepreg l, which has increased adhesiveness, on the heat play i-8, which is a stacking table, and then the press roll 9 is slid. Press it while squeezing it. In the illustrated example, the feeding of the first prepreg 1 is stopped during this period, and the feeding of the second prepreg 2 is similarly stopped during this period after being placed.

In the illustrated example, the first prepreg i7 being sent out
In addition, a step of preheating and imparting tackiness is added prior to this polymerization step C. This heating is performed by a heating device 11 that irradiates the first prepreg l from the upper blade side with far infrared heaters 10 1 , 10 , . . . .

Then, in the cutting step DVC, the second prepreg 2 is cut along the side edge of the first prepreg l to its width, which is performed after the polymerization step C. However, you can do it before then. This cutting is performed by a cutter 12 or the like that slides along the side edge of the first prepreg.

Thereafter, the first prepreg 1 obtained by cutting and polymerizing the second prepreg 2 is sent in a constant force direction X for a predetermined distance. For example, the second prepreg 2 is fed in a certain direction X VC by the width dimension.

Then, repeating such polymerization step C and cutting step,
The second prepreg 2 is cut and polymerized one after another on the slurry preg of jJl. - In the force sending step E, the prepreg 3' is wound and held in a holder etc. and has the same width as the first prepreg l. The third prepreg 3, which has become a linear strip, is sent out in the same direction as the prepreg 1 of the order 1, and the fiber direction is also aligned, and the third prepreg 3 is sent out along the fixed direction X. At this time, if a release paper 13 is interposed in the prepreg 3', this is also rewound and separately wound onto a winding section 14 or 5, etc. In the drawing and joining step F, a third The first prepreg 1 is placed on the second prepreg 2 which is cut and polymerized onto 84'l of prepreg 3.
Heat and press along the longitudinal direction. In the illustrated example, this hot pressure bonding is carried out by applying pressure while imparting tackiness using a heating roll 15 that circulates warm water. The first layer that came out of the stack. Second
Prepreg 1, 2 of °h'43. ．． 3 is a step of polymerizing release paper 16 on the outer garment surface as appropriate, cooling roll 1
After passing through a step of cooling by passing through a tube 7, the sheet is cut into a certain length by a cutter 18 as shown in the illustration, or wound up by a winder.

As explained above, the method for laminating prepreg according to the present invention continuously and automatically achieves stable quality by feeding strip-shaped prepregs as raw materials and cutting and heating and pressing them as appropriate. It has the effect of being able to efficiently and quickly laminate prepregs with different fiber directions and excellent strength.
In addition, it has the effect of reliably preventing the deterioration of product quality due to the adhesion of dust and other substances to the laminated W1 due to the conventional process. −
In addition, it is possible to laminate many layers of prepreg as necessary, such as by subjecting the laminate once obtained to this process to laminate more layers. Furthermore, since the stacking angle of the prepreg can be changed at any time, it has the effect of appropriately demonstrating the characteristics of prepreg as a material to meet various needs, which is different from conventional methods. Its effects are remarkable, such as eradicating problems.

[Brief explanation of the drawing]

The drawings are for explaining an embodiment of the method for laminating prepreg according to the present invention, and FIG.
The plan view and FIG. 2 are schematic perspective views showing the flow along the process of prepreg.
2'...Second prepreg 3.3'...
・・・・・・Third prepreg 4・・・・・・・・・
・・・・・・14+I pattern 5・・・・・・・・・・・・
... Winding section 6 ...... ν Regular paper pattern 7 ...... Winding section 8 ...
・・・・・・・・・・・・Heat Freight 9・・・・・・
・・・・・・・・・Press roll 10・・・・・・・・・
......Far infrared heater 11...
・・・・・・Heating device 12・・・・・・・・・・・・
... Cutter 13 ...... Release paper 14 ...... - ... Winding section 15
・・・・・・・・・・・・Heating roll 16...
・・・・・・・・・・・・Riya paper 17・・・・・・・・・
・・・・・・Cooling roll 18・・・・・・・・・・・・
...Cutter A......Feeding process B......Feeding process C...
・・・・・・・・・・・・Polymerization step D・・・・・・・
・・・・・・・・・Cutting process E・・・・・・・・・・・・
・・・Delivery process F・・・・・・・・・・・・・・・Polymerization step X・・・・・・・・・・・・・・・Direction Y・・・・
・・・・・・・・・Force direction=7′

Claims (1)

[Claims] A method of laminating at least three or more layers of prepreg, comprising a feeding step of intermittently feeding out a first strip-shaped prepreg in a constant force direction, and a direction shifted by a predetermined angle from this direction. a delivery step of sending out a band-shaped second 1-reg leg; a polymerization step of heat-pressing both of these 1-reg preg; and cutting the second prepreg to its width along the side edge of the first prepreg. a cutting step, a feeding step of sending out a band-shaped third prepreg in synchronization with the first prepreg, and a feeding step of sending out the third prepreg in synchronization with the first prepreg, and cutting and joining the third prepreg onto the prepreg i1. 1. A method for laminating prepreg, comprising: a polymerization step of heating and pressing onto the prepreg.